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Catalytic combustion of VOCs over a series of manganese oxide catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
47262 46465 2010 6 PDF Available
Title
Catalytic combustion of VOCs over a series of manganese oxide catalysts
Abstract

Catalytic combustion of volatile organic compounds (VOCs: benzene and toluene) was studied over manganese oxide catalysts (Mn3O4, Mn2O3 and MnO2) and over the promoted manganese oxide catalysts with alkaline metal and alkaline earth metal. Their properties and performance were characterized by using the Brunauer Emmett Teller (BET), temperature programmed reduction (TPR), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The sequence of catalytic activity was as follows: Mn3O4 > Mn2O3 > MnO2, which was correlated with the oxygen mobility on the catalyst. Each addition of potassium (K), calcium (Ca) and magnesium (Mg) to Mn3O4 catalyst enhanced the catalytic activity of Mn3O4 catalyst. Accordingly, K, Ca and Mg seemed to act as promoters, and the promoting effect might be ascribed to the defect-oxide or a hydroxyl-like group. A mutual inhibitory effect was observed between benzene and toluene in the binary mixture. In addition, the order of catalytic activity with respect to VOC molecules for single compound is benzene > toluene, and the binary mixture showed the opposite order of toluene > benzene.

Keywords
Catalytic combustion; Manganese oxide; Alkaline metal; Alkaline earth metal; Promoter
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 98, Issues 3–4, 1 August 2010, Pages 180–185
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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